I was wondering recently why it is that Kazuma will often rest on his laurels and retreat into NEET habits while Subaru is only pictured once as giving into prior habits. I think this is the primary difference outside of genre that separates the two protagonists, on one side KonoSuba's attempt to satirize and question the reborn in a fantasy world genre, while Re:zero (while still a well executed piece of drama, which is not bogged down as often by the flaws of the same said genre) is unable to provide a clear line of reasoning for how the protagonist functions in the new world despite their social flaws.

More so, I find it often difficult to comprehend how Subaru even became a social outcast in the first place. It's clear that hikikomorism is a part of Subaru's character, particularly in how he talks about himself (either in jest, or as demonstrated in episode 18), however outside of his own outbursts, he seems to function alright in terms of social interactions (for example he doesn't seem to have any problems befriending people nor does he exhibit actions that would make me say he has Middle Schooler's disease.

Kazuma's ability to work around his NEET/hikikomori habits seems to stem from either his knowledge of game-like situations or other forms of pop culture situations, but if that were the case for Subaru, you would think that half of his tension and drama of his own series wouldn't upset him or make him make truly outrageous decisions as the first half of the second season seemed to convey.